This is a front-end for the Online Encyclopedia of Integer Sequences, made by Christian Perfect. The idea is to provide OEIS entries in non-ancient HTML, and then to think about how they're presented visually. The source code is on GitHub.
| n | a(n) |
|---|---|
| 1 | 0 |
| 2 | 22 |
| 3 | 252 |
| 4 | 2332 |
| 5 | 20002 |
| 6 | 26062 |
| 7 | 29392 |
| 8 | 63736 |
| 9 | 68886 |
| 10 | 2701072 |
| 11 | 2783872 |
| 12 | 2884882 |
| 13 | 29122192 |
| 14 | 253080352 |
| 15 | 289050982 |
| 16 | 25661316652 |
| 17 | 237776677732 |
| 18 | 2393677763932 |
| 19 | 215331808133512 |
| 20 | 218759969957812 |
| 21 | 225588939885522 |
| 22 | 235212787212532 |
| 23 | 636759171957636 |
| 24 | 682911868119286 |